Shackle-hook



F. -T. DUNHAM.

SHACKLE HooK.

APPLICATION FILED IAN. 5| 1920.

1,381,405. Patented June 14,1921.

lumen/for @normas PAThlhlT QFHICE.

SHACKLE-HOOK.

Application filed January 5, 1926.

To all 'whom t may concern Be it known that I, Foniznsr T. DUNHAM, i citizen of the United States, residing at in. or in, in the county of Sheba-lis and fState of lVashington, have invented` certain new and useful Improvements 1n Shacklefo-oks, of which the following is a specication.

This invention relates to hoisting, and more specifically to improvements in shacklehooks.

rllhe object of my invention is to provide a shackle-hook so constructed as to withstand great strain, in that the stress is divided equally between two points instead of one point, and the hook so fashioned that any pull thereon will be at diametrically opposite points and in a direct line with the greatest strength thereof. lVhere hooks are so constructed that the strain thereon is directed laterally of the metal, it tends to weakness in construction.

A further Object of my invent-ion is to provide a shackle-hook especially adaptable for use in the logging industries, in moving heavy donkey engines and heavy timber. In this particular use it has been found that all of the ordinary hooks heretofore used frequently catch or become entangled in brush, logs, trees, and trash of all kinds, causing a great deal of trouble, the loss of considerable time, and injury, not only to the machinery, but to the men engaged in the work. By providing a closed hook, having no angular corners or sharp projections, I have overcome these difficulties and dangers.

Furthermore, I provide a positive lock for the hook when inclosed position, though at the same time not departing from simplicity of construction, and operation, nor detraoting from the durability of my hook.

Other Object-s of this invention not at this time more particularly enumerated, will be clearly understood from the detailed description and drawings forming a part of this specification.

Referring now to the drawings, which are merely illustrative of my invention.

Figure 1 is a side elevation of my hook in locked position.

F ig. 2 is an edge elevation of the same.

Referring further to the drawings, wherein similar reference characters designate similar parts throughout the respective views, 1 designates a substantially V-shaped y Specification of Letters Patent,

Patented Serial No. 349,471.

keeper, having a long arm 2 and a relatively shorter arm 3, botn of said arms being bifurcated and each being formed with a perforation centrally of the bifurcated portions thereof. Interiorly of one side of one of the bifurcat ons on said shorter arm is formed a circuniferentially disposed groove el, a notch 5 being cut through the outer face of said bifurcation, so as to register with said groove. An eye 6 is formed transversely through said keeper at a point adjacent the apex thereof, said eye being adapted to receive one end of a hauling line.

A substantially U-shaped shackle hook 7 is formed with a short arm 8 and a relatively longer arm 9. Both of said arms are formed with perforations transversely therethrough near the ends thereof. The perforation through the shorter arm of said U-shaped hook is adapted to register with the perforations through the bifurcations of the longer arm 2 of said keeper, and be retained in piv oted engagement therewith by means of bolt 10. The perforation through the longer arm of said U-shaped hook is adapted to register with the perforations through the bifurcations of the shorter arm 3 of said keeper, and to be retained in engagement therewith by means of a lock pin 11, provided with a key lug 12 adapted to register with the notch 5 in said keeper, and thence to seat within the groove 4, thereby looking the pin and the hook securely in closed position. When it is desired to unlock the hook, the lock pin 11 must be turned until the key lug 12 registers with the notch 5 which leads from the groove 4 to the outer face of the bifurcation, whereupon the pin may be withdrawn and the hook released. In order that the pin may not become lost and may always be handy for immediate use, I provide a ring member 13 upon the end of the lock pin 11 and iX another ring member 14 within the crotch of the U-shaped keeper, interposing a flexible chain 15 between said ring members.

The utility, adaptability, and advantages of my improved form of shackle-hook being obvious, it is unnecessary to further enlarge upon the same herein.

Having now described and pointed out the new and useful features of my invention, I do not limit myself to the shape of certain parts where the shape is not essential, nor do I restrict myself to the exact details of construction shown and described, but mean and intend to claim all equivalents and variations thereof not departing in principle from my invention, and falling Within the purview of the appended claim.

What I claim is:

In a hook of the class described, a deep substantially U-shaped shackle member having a rounded smooth surface with the side faces of its terminals flattened and merging gradually without shoulders at their bases into the body o1" said member With their `liree ends apertured, one arm being shorter than the othen a substantially V-shaped keeper member having a 'rounded smooth surface and one arm4 longer than the other, the terminals of said arms being bifurcated edge- Wise to receive the flattened ends of said shackle member and having apertures regis tering with the apertures in said lattened ends to receive respectively a pintle and a locking pin, the apex of said keeper being rounded to form a smooth elongated nose for forcing its Way through obstructing objects Without engaging them' and provided with a line receiving eye, the long arm of the keeper being pivotally connected With the short arm of the shackle and the short arm of the keeper detachably engaged with the long arm .of the shackle, the so connected shackle and keeper members forming an elongated substantially ova-te member provided With an elongated Vlongitudinally eX- tending central opening to receive the draft and load engaging elements whereby pull exerted on said member Will be atdiametrically opposite points in direct line With the greatest strength thereof, and the dra-ft and load engaging elements held out of contact with each other.

In testimony whereof l alix my signature hereto.

Y FORRE ST T. DUNHAM., 

